WASHINGTON (CBSDC) – With the use of domestic drones increasing, concern has not just come up over privacy issues, but also over the potential use of lethal force by the unmanned aircraft.

Drones have been used overseas to target and kill high-level terror leaders and are also being used along the U.S.-Mexico border in the battle against illegal immigration. But now, these drones are starting to be used domestically at an increasing rate.

The Federal Aviation Administration has allowed several police departments to use drones across the U.S. They are controlled from a remote location and use infrared sensors and high-resolution cameras.

Chief Deputy Randy McDaniel of the Montgomery County Sheriff’s Office in Texas told The Daily that his department is considering using rubber bullets and tear gas on its drone.

“Those are things that law enforcement utilizes day in and day out and in certain situations it might be advantageous to have this type of system on the UAV (unmanned aerial vehicle),” McDaniel told The Daily.

The use of potential force from drones has raised the ire of the American Civil Liberties Union.